公开(公告)号：US20240011903A1

公开(公告)日：2024-01-11

申请号：US18036360

申请日：2021-11-10

Applicant: PURDUE RESEARCH FOUNDATION

Inventor： David D. NOLTE ,  Kwan JEONG ,  Maria Josef LOPERA ,  John J. TUREK

IPC: G01N21/47 ,  G01J3/02 ,  G01J9/02

CPC classification number: G01N21/474 ,  G01J3/0208 ,  G01J3/021 ,  G01J9/02 ,  G01N2015/1006

Abstract: Apparatuses and methods for investigating the inside of a tissue cell are disclosed. Embodiments include diffusely scattering light off a target sample, producing two crossing beams from the scattered light, and using a camera to create an image from the light. Some embodiments utilize a Fourier lens and a Fresnel biprism, and optionally include a long-coherence light source, a delay plate (which can be a polarization rotator or an optical flat), and/or a beam expander. Still further embodiments utilize a diffraction grating, a spatial filter (which may include two differently sized apertures), and a Fourier lens, and optionally include differently sized apertures in the spatial filter. Some embodiments include a transparent support and illuminating the target at an oblique angle through the transparent support. Still further embodiments utilize a low-coherence light source and/or immobilizing the sample tissue using surface bonding chemistry.

公开(公告)号：US20240011832A1

公开(公告)日：2024-01-11

申请号：US18347908

申请日：2023-07-06

Applicant: Shphotonics Ltd

Inventor： Lei SUN ,  Bing QIU

IPC: G01J3/28 ,  G01J3/02 ,  G02B1/00 ,  G02B3/00

CPC classification number: G01J3/2823 ,  G01J3/0208 ,  G01J3/021 ,  G02B1/002 ,  G02B3/0043 ,  G02B2207/101

Abstract: A metasurface spatial spectrometer includes a beam splitter, a first reflector, a second reflector, and a reception sensor. A reflective surface of the first reflector or the second reflector includes a plurality of sub-wavelength structures with different functions and arranged according to preset positions. The beam splitter is configured to: transmit a first portion of incident light and reflect a second portion of the incident light, transmit a portion of light reflected by the first reflector, and reflect a portion of light reflected by the second reflector. The first reflector is arranged at an angle of 45°, −45°, 135°, or −135° with respect to the beam splitter, and is configured to reflect the second portion of the incident light. The second reflector is arranged perpendicular to the first reflector, and is configured to reflect the first portion of the incident light.

公开(公告)号：US20230375406A1

公开(公告)日：2023-11-23

申请号：US18197357

申请日：2023-05-15

Applicant: IMEC VZW ,  Katholieke Universiteit Leuven

Inventor： Vladimir PEJOVIC ,  David CHEYNS ,  Xavier ROTTENBERG ,  Kristof LODEWIJKS ,  Pawel MALINOWSKI ,  Yunlong LI ,  Gauri KARVE

IPC: G01J3/28 ,  G01J3/02 ,  H10K39/32

CPC classification number: G01J3/2823 ,  G01J3/021 ,  H10K39/32 ,  G01J2003/2826

Abstract: A light sensor for spectrally resolved light detection, said light sensor comprises: an upper reflective element; a lower reflective element; a photo-sensitive element therebetween; a spacer element, configured to form the lower reflective element or arranged between the upper and the lower reflective element; wherein the elements form a stack of layers which define a resonance structure between the upper and the lower reflective element for providing a resonance of light; wherein the spacer element comprises at least two different materials, a distribution of which is different between different pixels in an array of pixels such that a resonance wavelength is different for different pixels; and wherein for a plurality of pixels, geometrical structures smaller than the resonance wavelength are defined by the at least two different materials.

公开(公告)号：US11719576B2

公开(公告)日：2023-08-08

申请号：US17083165

申请日：2020-10-28

Applicant: California Institute of Technology

Inventor： William R Johnson ,  Matthew E Kenyon ,  Jordana Blacksberg ,  Carol A Raymond ,  Bethany L Ehlmann ,  Xiangwen Chen

IPC: G01J3/28 ,  G01J3/02 ,  G01J3/18 ,  B64G1/66 ,  G02B23/06 ,  G01J5/12

CPC classification number: G01J3/2803 ,  B64G1/66 ,  G01J3/021 ,  G01J3/0286 ,  G01J3/18 ,  G01J5/12 ,  G02B23/06 ,  G01J2003/2813

Abstract: Methods and devices to implement mid-wave and long-wave infrared point spectrometers are disclosed. The described methods and devices involve bi-faceted gratings, high-operating-temperature barrier infrared and thermal detectors. The disclosed concept can be used to design flight spectrometers that cover broad solar reflectance plus thermal emission spectral ranges with a compact and low-cost instrument suitable for small spacecraft reconnaissance of asteroids, the Moon, and planetary satellites as well as mass-constrained landed missions.

公开(公告)号：US11698300B2

公开(公告)日：2023-07-11

申请号：US17546627

申请日：2021-12-09

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jeong Eun Kim ,  Kye Eun Kim ,  Keo Sik Kim ,  Hyun Seo Kang ,  Hyun Jin Kim ,  Gi Hyeon Min ,  Si Woong Park ,  Hyoung Jun Park ,  Chan Il Yeo ,  Young Soon Heo

IPC: G01J3/02 ,  G02B3/04 ,  G02B27/30 ,  G02B26/08 ,  G01J3/28 ,  G01J3/18 ,  G02B3/00

CPC classification number: G01J3/0208 ,  G01J3/021 ,  G01J3/18 ,  G01J3/2823 ,  G02B3/04 ,  G02B26/0833 ,  G02B27/30 ,  G01J2003/2826 ,  G02B2003/0093

Abstract: Provided are an optical system capable of improving the spatial resolution of hyperspectral imaging and an optical alignment method using the same. The optical system includes a digital micromirror device (DMD) having a rectangular shape, a first cylindrical lens curved to focus and form an image on an axis corresponding to a shorter side of the DMD, and a second cylindrical lens curved in the same axial direction as the axis to collimate light reflected from the DMD.

公开(公告)号：US20230194348A1

公开(公告)日：2023-06-22

申请号：US17915388

申请日：2020-12-16

Applicant: Beijing RSLaser Opto-Electronics Technology Co., Ltd.

Inventor： Guangyi LIU ,  Rui JIANG ,  Xiaoquan HAN ,  Jiangshan ZHAO ,  Pengfei SHA ,  Qingqing YIN ,  Hua ZHANG ,  Xinyue HU

IPC: G01J3/45 ,  G01J3/02

CPC classification number: G01J3/45 ,  G01J3/021 ,  G01J2003/451

Abstract: Provided are a device (4) and a method for online measuring a spectrum for a laser device. The device (4) for online measuring a spectrum for a laser device includes: a first optical path assembly (G1) and a second optical path assembly (G2), and the second optical path assembly (G2) and the first optical path assembly (G1) constitute a measurement optical path. The second optical path assembly (G2) includes: an FP etalon (15) and a grating (18). The homogenized laser beam passes through the FP etalon (15) to generate an interference fringe. The grating (18) is arranged after the FP etalon (15), or is arranged before the FP etalon (15) in the measurement optical path, and is configured to disperse the laser beam passing through the FP etalon (15). A high precision measurement in a wide range for a central wavelength of a laser beam and an accurate measurement for spectral parameters of a corresponding FWHM and E95 are achieved through an arrangement of the FP etalon and the grating “in series” in the measurement optical path. There is no moving element in the measurement optical path, the structure is simple and compact, the measurement precision is high, and the stability is high. The corresponding measurement algorithm is simple and efficient, and has an extremely high scientific research or commercial application value.

公开(公告)号：US20190226912A1

公开(公告)日：2019-07-25

申请号：US16372725

申请日：2019-04-02

Applicant: Big Sur Scientific, LLC

Inventor： Brian Charles Smith

IPC: G01J3/26 ,  G01N21/552 ,  G01J3/02 ,  G01N33/94

CPC classification number: G01J3/26 ,  G01J3/0202 ,  G01J3/0205 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0264 ,  G01J3/0286 ,  G01J3/0291 ,  G01J3/32 ,  G01J2003/1247 ,  G01N21/552 ,  G01N33/948 ,  G01N2201/0221

Abstract: Disclosed is a combination of a Fabry-Perot Tunable Filter (FPTF) wavelength selector, an internal reflection element (IRE) capable of measuring Attenuated Total Reflectance (ATR) spectra, and a pressure application element for applying pressure to samples, if needed. The resultant portable and compact device is called an FPTF-ATR spectrometer. The device measures data that can be used to identify chemical species in samples, predict properties of samples, and quantify amounts of chemical species in samples. Also disclosed are methods for using the FPTF-ATR for analyzing samples, especially analyzing compounds containing cannabis, hops, and other chemical species where portable chemical analysis is important.

公开(公告)号：US20190145891A1

公开(公告)日：2019-05-16

申请号：US16129731

申请日：2018-09-12

Applicant: MultiSensor Scientific, Inc.

Inventor： Allen M. Waxman ,  Terrence K. Jones ,  Jason M. Bylsma ,  Stefan Bokaemper

IPC: G01N21/3504 ,  G01N33/22

CPC classification number: G01N21/3504 ,  E21B41/0021 ,  G01F1/661 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/06 ,  G01J3/10 ,  G01J3/2803 ,  G01J3/2823 ,  G01J3/42 ,  G01J2003/1213 ,  G01J2003/1221 ,  G01J2003/2806 ,  G01J2003/2826 ,  G01M3/20 ,  G01M3/38 ,  G01N21/359 ,  G01N33/0036 ,  G01N33/225 ,  G01N2021/1795 ,  G01N2021/3513 ,  G01N2201/101

Abstract: Presented herein are systems and methods directed to a multispectral absorption-based imaging approach that provides for rapid and accurate detection, localization, and quantification of gas leaks. The imaging technology described herein utilizes a scanning optical sensor in combination with structured and scannable illumination to detect and image spectral signatures produced by absorption of light by leaking gas in a quantitative manner over wide areas, at distance, and in the presence of background such as ambient gas and vapor. Moreover, the specifically structured and scannable illumination source of the systems and methods described herein provides a consistent source of illumination for the scanning optical sensor, allowing imaging to be performed even in the absence of sufficient natural light, such as sunlight. The imaging approaches described herein can, accordingly, be used for a variety of gas leak detection, emissions monitoring, and safety applications.

公开(公告)号：US20190017869A1

公开(公告)日：2019-01-17

申请号：US16068316

申请日：2017-01-06

Applicant: NEDERLANDSE ORGANISATIE VOORTOEGEPAST- NATUURWETENSCHAPPELIJK ONDERZOEK TNO

Inventor： Borgert KRUIZINGA ,  Hedser van BRUG ,  Frerik van BEIJNUM

IPC: G01J3/02 ,  G01J3/18 ,  G01J3/28

CPC classification number: G01J3/0208 ,  G01J3/021 ,  G01J3/0259 ,  G01J3/18 ,  G01J3/2823 ,  G01J2003/1204 ,  G01J2003/1282

Abstract: A monolithic spectrometer (10) for spectrally resolving light (L), comprises a body (2) of solid material having optical surfaces (3,4,5,6a-6c,8) configured to guide the light (L) along an optical path (E1,E2,E3,E4) inside the body (2). The optical surfaces of the body (2) comprise a segmented focusing surface (6a,6b) comprising first and second continuously functional optical shapes (Ca,Cb) to focus received parts of respective beams (La,Lb) onto respective focal position (fa,fb) in an imaging plane (P) outside the body (2). The second continuously functional optical shape (Cb) is separated from the first continuously functional optical shape (Ca) by an optical discontinuity (Dab) there between.

公开(公告)号：US20180340824A1

公开(公告)日：2018-11-29

申请号：US15982296

申请日：2018-05-17

Applicant: Ocean Optics, Inc.

Inventor： Kirk Clendinning

IPC: G01J3/04 ,  G01J3/02 ,  G02B6/26 ,  G01J3/14 ,  G01J3/28

CPC classification number: G01J3/04 ,  G01J3/0208 ,  G01J3/021 ,  G01J3/0221 ,  G01J3/14 ,  G01J3/28 ,  G02B6/26

Abstract: An optical slit device that combines microelectromechanical design techniques, semiconductor laser technology, and micro-optics to provide a spectrometer entrance slit on a semiconductor substrate with integrated calibration light sources, which integrated light enters the entrance slit and is transmitted down the same optical path as a light source under test and by which the spectrometer can be wavelength calibrated in situ is disclosed.